Achates (disambiguation)

Achates may refer to:

• Achates (Greek mythology)
• Achates, name of two ships
• Achates (river), the Sicilian river known in antiquity as the Achates
• 5144 Achates, an asteroid
• Agate, the gemstone called achates by Theophrastus and Pliny the Elder
• Leonardus Achates, the fifteenth century composer from Basel
• HMS Achates, the series of British Royal Navy ships named for after this character
• Achates Power, an American developer of engines